/// <summary>
/// Constructor for DeviceStatusMonitor. Specifies
/// the class of notifications desired and whether
/// notifications should be fired for already-attached
/// devices.
/// </summary>
/// <param name="deviceClass">
/// Device class to monitor.
/// </param>
/// <param name="notifyAlreadyConnectedDevices">
/// Set to true to receive notifiations for devices
/// which were attached before we started monitoring;
/// set to false to see new events only.
/// </param>
public DeviceStatusMonitor(DeviceClass deviceClass, bool notifyAlreadyConnectedDevices)
{
object[] attribs = deviceClass.GetType().GetField(deviceClass.ToString()).GetCustomAttributes(typeof(DeviceClassAtrribute), false);
if ((attribs == null) || (attribs.Length != 1))
{
throw new ArgumentException("Unknown Device Class");
}
DeviceClassAtrribute dca = attribs[0] as DeviceClassAtrribute;
m_deviceClass = dca.Guid;
m_fAll = notifyAlreadyConnectedDevices;
}